The Final Voyage 

Witness the remarkable decade-long journey that transformed a decommissioned Australian Navy vessel into an extraordinary underwater landmark.

This compelling documentary captures the full narrative behind securing the ex-HMAS Adelaide—from her active service at sea to her deliberate placement on the ocean floor as a purpose-built dive destination.

Follow the compelling cast of characters, pivotal moments, and untold stories that shaped this ambitious conservation project.
Discover the complex interplay of advocates and skeptics whose determination ultimately created something unprecedented:

NSW's only accessible naval wreck dive site.
Experience the human resolve, strategic vision, and environmental stewardship that culminated in transforming military heritage into a thriving submerged sanctuary for divers and marine life alike.

A testament to vision, persistence, and the enduring legacy of Australia's maritime history.

Wreck Dive - The Speedwell

Explore a Piece of Central Coast Maritime History

Discover the scattered remains of the Speedwell, a historic sailing ship lost on the notorious Bull Reef between Bird Island and Norah Head on April 14th, 1884.

The 350-ton barquentine Speedwell was travelling in ballast from Newcastle to Sydney when, during heavy weather, she sought shelter near Norah Head. According to historical accounts, Captain Sampson believed the vessel was caught by a powerful whirlpool-like current that swept her broadside onto the rocky reef.

The impact mortally damaged the ship. She quickly began taking on water and sank, scattering wreckage across the reef. Fortunately, with the vessel close to shore, all ten crew members escaped.

Today, more than a century of ocean conditions have reduced the Speedwell to scattered remains, but divers can still discover pieces of the wreck across the reef, including a large anchor and sections of ship plating.

A Great Shallow-Water Wreck Adventure

With depths ranging from approximately 8 to 14 metres, the Speedwell offers a very different wreck experience from the deeper offshore wrecks of the Central Coast.

The relatively shallow depth provides plenty of time to explore the reef, search for remnants of the vessel and imagine the dramatic events that unfolded here more than a century ago.

Although shallow, this remains an offshore reef and wreck dive, so participation is subject to diver experience, certification and prevailing sea and weather conditions.

Boat Dive from Norah Head

The Speedwell is accessed by boat from Norah Head, with trips subject to suitable boating and diving conditions.

Minimum numbers apply — six divers are required for the trip to proceed.

Dive the Wreck. Discover the Story.

This isn't about exploring an intact shipwreck. It's about discovering the scattered remains of a vessel claimed by one of the Central Coast's notorious reefs and diving directly into a fascinating piece of local maritime history.

Grab your buddy, book your place and come searching for the Speedwell.

Wreck Dive — SS Paterson

The Perfect Introduction to Central Coast Wreck Diving

Explore the remains of the SS Paterson, one of the small coastal steamers that once worked the busy NSW coastline between Newcastle and Sydney.

Built in Sydney in 1920, the 148-foot wooden steamer met her end on 11 June 1951. After departing Cabbage Tree Bay, the Paterson sprang a leak and sank dramatically in approximately 10 metres of water, less than 300 metres from the wharf.

Being a wooden vessel lying in shallow water close to a rocky shoreline, decades of storms, swell and shifting sand have taken their toll. Salvage operations also removed much of the vessel's cargo and equipment, leaving behind a scattered but fascinating historic wreck site.

Shallow Wreck - Plenty to Explore

With depths of approximately 8 to 10 metres, the SS Paterson is an excellent introduction to wreck diving and a great second dive when you still have plenty of gas left in the cylinder.

The large fire-tube boiler is the most prominent feature of the wreck, while scattered remains extend across a surprisingly large area.

Take your time and look closely. The wreck has become part of the marine environment, with moray eels and lingsheltering amongst the remains and the occasional large wobbegong resting beneath sections of wreckage.

A Wreck Site That Changes With the Ocean

One of the fascinating features of the Paterson is that the site can change after major weather events. Heavy seas can move enormous quantities of sand, covering some sections while exposing others that may have been buried for years.

Historic items including old toothpaste tubes, jars, cutlery, plates, cups and saucers have reportedly been found around the wreck site over the years.

Look, photograph and enjoy the history,  but leave historic material where you find it.

An Excellent Wreck Training Site

The shallow depth and scattered structure make the SS Paterson particularly suitable for developing wreck-diving skills.

There are no wreck penetration opportunities, but the site provides plenty of features and obstacles for practising wreck orientation, mapping, buoyancy control, navigation and hazard identification under appropriate supervision.

Although this is a shallow dive, divers should still hold appropriate certification and experience for the planned dive, and all dives remain subject to weather, sea conditions and the assessment of the dive operator.

Boat Dive — Norah Head

The wreck is conveniently located only a short boat ride from the Cabbage Tree Bay/Norah Head launch area, making it an accessible piece of Central Coast maritime history.

Minimum numbers apply — six divers are required for the boat dive to proceed.

Start Your Wreck Diving Adventure

You don't need 40 metres of water and a massive steel ship to experience wreck diving.

The SS Paterson combines maritime history, marine life, shallow-water exploration and wreck-diving skills in one fascinating site.

Grab your buddy, book your place and come explore one of the Central Coast's historic wreck sites.

Wreck Dive - TSS Nerong

Mystery, Tragedy and a Remarkable Deep-Water Wreck

The story of the TSS Nerong has everything a wreck diver could ask for — maritime history, mystery, tragedy and a fascinating wreck lying deep off the Central Coast.

Built at Balmain, Sydney, in 1903, the Nerong was a 219-ton, 36.6 metre twin-screw coastal steamer operated by the North Coast Steam Navigation Company. Her shallow draft and twin propellers made her particularly well suited to negotiating the bars and winding waterways of the northern NSW rivers.

On 18 September 1917, the Nerong departed Sydney bound for the Nambucca River with passengers, crew and approximately 130 tons of mixed cargo, including supplies destined for communities along the NSW North Coast.

But a ferocious coastal storm was waiting.

Into the Storm

During the early hours of 19 September, the Nerong was battling enormous seas and a powerful south-easterly gale. Then came the news no captain wanted to hear.

Water was entering the engine room.

The crew fought desperately to save their ship. Pumps were worked and water bailed as the situation steadily deteriorated.

What made the situation particularly disturbing was that the Nerong was regarded as a capable coastal vessel. Earlier in 1917 she had suffered serious hull damage crossing the Nambucca River bar, but had subsequently undergone repairs.

Despite the crew's efforts, the incoming water overwhelmed the vessel. The engines eventually stopped and the Nerong was left helpless in the storm.

The order was eventually given to abandon ship.

The Nerong foundered off Norah Head on 19 September 1917. Tragically, three lives were lost.

More than a century later, she remains on the seabed.

Dive the Nerong

Resting on beautiful sand at approximately 43–45 metres, the Nerong has become one of the Central Coast's fascinating deep-water wreck dives.

Time and the ocean have taken the vessel's upper structure, but significant features remain scattered across the wreck site.

The boiler, machinery, stern structure and other sections of wreckage provide plenty to explore, while the site has developed into an impressive artificial habitat.

Expect marine life.

Large cuttlefish, schooling morwong, yellowtail and nannygai can congregate around the wreck, while wobbegongs frequently make themselves comfortable amongst the remains. On a good day, the combination of white sand, wreckage and schooling fish can make the Nerong an outstanding Central Coast wreck dive.

This Is a Serious Deep Dive

The Nerong lies well beyond normal recreational diving depths.

At approximately 43 to 45 metres, divers must hold appropriate deep, extended-range or technical certification suitable for the planned dive profile.

Divers should have appropriate recent deep-diving experience and suitable equipment, redundancy, gas planning and decompression capability for the dive being undertaken.

Certification alone does not guarantee participation. Experience, recent diving activity, equipment configuration, gas requirements and prevailing conditions may all be considered before divers are accepted for the trip.

This is a dive where preparation, buoyancy control, gas management and disciplined dive procedures matter.

A Wreck With a Story

When you're hovering over the Nerong, you're not simply looking at another collection of steel on the seabed.

You're diving the remains of a vessel that once connected Sydney with the communities of northern NSW — a small coastal steamer that carried people, provisions and cargo along a coastline where the sea could turn from workplace to enemy remarkably quickly.

More than 100 years after the Nerong disappeared beneath the waves, divers can still descend onto her remains and experience that history firsthand.

Boat Dive — Norah Head

Wreck dives to the Nerong depart from Norah Head and are subject to suitable weather, sea conditions and diver experience.

Minimum numbers apply — six qualified divers are required for the boat dive to proceed.

Go Deeper. Dive the History.

For suitably trained divers looking for something beyond the ordinary, the Nerong delivers depth, history, marine life and genuine wreck exploration in one memorable dive.

Qualified deep and XR divers — gather your team and book your place aboard.

The SS Kiama a 446-ton, collier may not have been the prettiest of colliers but, as a workhorse plying her trade almost by clockwork along the coast, on its regular journey between Newcastle and Sydney, she was very profitable and reliable for her owners.

The fate of the SS Kiama was sealed in 1951 when she was caught in a storm off the Entrance Bommie, the ships crew tried desperately to save the vessel to no avail.

The tragedy of the Kiama was a blow to several families of the coast as the crew were all well known locals.

To the crew, after the Kiama capsized, having to float off the coast so close to shore but yet so far, must have been extremely difficult to endure.
The Kiama lays in 45 metres of water. The most prominent feature is the engine laying off to the port side and the large boiler.

This is a dive for experienced deep divers and some artefacts can still be found. 

Boat dives from Terrigal boat ramp, require a minimum of six divers to run.

Wreck Dive - The Galava

Deep, Historic and Definitely Not an Everyday Dive

Sitting on the sand at approximately 50 - 51 metres, the wreck of the Galava is one of the Central Coast's deeper and more challenging wreck dives. This is a dive reserved for appropriately trained and experienced deep or technical divers.

Originally built in Workington, England, the Galava was a steel-hulled cargo steamer powered by a single screw and a two-cylinder compound steam engine.

She became one of the coastal colliers commonly known as the "Sixty-Milers"  the hardworking vessels that transported coal from ports such as Catherine Hill Bay to Sydney and helped keep the growing city supplied with fuel.

On 8 February 1927, the Galava developed serious leakage around her forward hull plates while off the Central Coast. Despite efforts to save her, the vessel foundered near Broken Head (the Skillion), off Terrigal and descended into the deep water where her remains can still be explored today.

Descend Into Central Coast Maritime History

The first glimpse of the Galava emerging from the depths can be spectacular.

Follow the descent line towards the sand and the wreck begins to reveal itself — heavy machinery, twisted steel and more than a century of maritime history spread across the seabed.

The stern remains relatively upright, with the rudder still visible above the sand.

One of the wreck's dominant features is the large Scotch boiler, sitting prominently above the seabed at an angle. Nearby are the remains of the two-cylinder compound steam engine, together with a substantial winch and other machinery.

Moving across the site, the collapsed hull plating and deck structure still provide a recognisable outline of the vessel. Bollards, structural sections and other substantial pieces of steel help divers reconstruct the shape of this former coastal workhorse.

Towards the bow, the anchor winch provides another easily identifiable feature.

There is a surprising amount to see - the problem is having enough time to see it.

The Fish Can Hide the Wreck

The Galava has spent almost a century becoming part of the surrounding marine environment. Schools of fish can congregate so heavily around the wreck that sections of the vessel can virtually disappear behind them.

The structure provides shelter for a variety of marine life, while the wreck's reputation as productive fishing ground means divers may also encounter fishing line, sinkers, lures and occasionally lost netting around the site.

Entanglement Hazard

Fishing line and discarded or lost fishing gear can create a significant hazard on this wreck. Divers should maintain excellent situational awareness and carry appropriate cutting devices as part of their equipment configuration. Do not become distracted by fishing gear or attempt removal unless it can be undertaken safely within the dive plan and without creating additional risk.

At 50 to 51 metres, dealing with an entanglement problem is considerably more serious than it would be on a shallow reef.

This Is an Advanced Deep/Technical Dive

The Galava is not a recreational deep dive for inexperienced divers.

At approximately 51 metres, the depth significantly affects gas consumption, no-decompression limits, decompression obligations, narcosis exposure and emergency options.

Divers must hold appropriate Extended Range or technical diving certification for the planned depth, gases and decompression profile, together with suitable recent experience.

A Galava dive requires comprehensive pre-dive planning, including:

• Appropriate breathing-gas selection and reserves

• Decompression planning

• Redundant gas supply

• Redundant critical equipment

• Appropriate ascent and decompression gases where required

• Suitable exposure protection

• Reliable dive computers and backup planning

• Appropriate cutting devices

• Lost-line and lost-wreck procedures

• Current and surface-condition assessment

• Clearly established buddy/team procedures

Certification alone does not guarantee participation. Diver experience, recent deep-diving activity, equipment configuration, gas requirements and prevailing conditions may all be assessed before joining the dive.

Depth Changes Everything

At 51 metres, bottom time is precious.

This isn't a wreck where you simply drop down and casually explore until your cylinder reaches half pressure. Every minute at depth affects the rest of the dive.

A properly planned descent gives you the opportunity to identify the boiler, engine, winches, stern and other major features before beginning the ascent and completing the required decompression profile.

Good buoyancy, disciplined gas management and staying with your dive team are essential.

A Wreck for Experienced Divers

The Galava rewards the diver who has progressed beyond ordinary recreational diving.

There is machinery to identify, the outline of the vessel to follow, abundant marine life and the unmistakable atmosphere of exploring a ship that has rested on the seabed for almost a century.

It is deep, challenging and historically fascinating.

And on the right day, with good visibility and a well-prepared team, the Galava can be an exceptional Central Coast wreck dive.

Boat Dive - Terrigal

Galava wreck dives depart by boat from Terrigal and are subject to suitable offshore weather, sea conditions and diver qualifications.

Minimum numbers apply — six suitably qualified and experienced divers are required for the trip to proceed.

Ready for Something Deeper?

If you have the training, experience and equipment to safely operate at this depth, the Galava deserves a place in your wreck-diving logbook.

51 metres. One historic Sixty-Miler. Almost 100 years beneath the sea.

Qualified XR and technical divers -  assemble your team and book your place aboard.

Wreck Dive  - TSS Hall Caine

A Deep-Water Time Capsule off the Central Coast

Deep off the southern Central Coast lies the scattered remains of the TSS Hall Caine — a fascinating wooden steamship with an extraordinary history and a wreck site that rewards suitably qualified divers with machinery, marine life and a genuine sense of exploration.

Built at Coopernook on the Manning River in 1912, the Hall Caine was approximately 40 metres long and 214 tons, powered by twin two-cylinder compound steam engines driving twin propellers.

Like many small coastal steamers of her era, she worked the NSW coastline carrying cargo and coal between ports.

Her working life came to an abrupt end in March 1937.

A Ship in Serious Trouble

The Hall Caine was travelling north from Sydney towards Lake Macquarie when she began taking on water near Broken Bay.

Another vessel, the Idant, came to her assistance and attempted to take the stricken steamer under tow. But the Hall Caine was losing the battle.

Water continued entering the vessel faster than the crew could remove it. Eventually it became obvious she could not be saved and the crew abandoned ship. The Hall Caine subsequently foundered off the Central Coast.

Fortunately, her crew were rescued by the Idant. What followed made the story even more remarkable.

An inquiry into the sinking reportedly found serious deficiencies in the condition of the vessel, including deterioration of the wooden hull and problems with the pumping arrangements. More than eight decades later, the Hall Caine is still down there.

Descending onto the Hall Caine

The wooden hull and superstructure have long since disappeared, leaving the ship's heavy machinery and metal components scattered across the sand. But don't mistake "scattered" for uninteresting. This is a compact wreck with some impressive features.

The large boiler dominates the site, while the twin compound steam engines, propeller shafts, twin bronze propellers, winches, anchor and other machinery provide divers with a surprisingly clear picture of how this small coastal steamer once operated.

At the stern, the twin propellers are particularly impressive and provide one of the wreck's signature features. Follow the remains forward and you'll encounter engines, machinery, winches and structural pieces scattered across the seabed.

Because the vessel was constructed primarily from timber, what you're really exploring today is the mechanical skeleton of the Hall Caine.

Small Wreck - Big Marine Life

The Hall Caine has been on the seabed since 1937 and has become an established artificial habitat. Schools of fish can congregate around the machinery while conger eels, flathead, wobbegongs and other temperate NSW marine species may be encountered amongst the wreckage.

Sometimes the fish life itself can be one of the highlights of the dive. The boiler, engines and other structures provide excellent shelter, turning what remains of this old working vessel into an oasis on an otherwise sandy seabed.

Watch for Fishing Line and Nets

The wreck has long been known as productive fishing ground.

That means divers should expect the possibility of monofilament line, fishing tackle, rope and lost netting around the wreck. Entanglement at these depths is a serious hazard.

Divers should carry appropriate cutting devices, maintain excellent situational awareness and avoid becoming unnecessarily involved in removing fishing gear unless it can be done safely within the team's dive plan.

This Is a Serious Deep Wreck Dive

The Hall Caine is not an entry-level wreck dive. Depending upon the exact section of the site and seabed depth, divers should expect depths in the mid-40-metre range and potentially deeper.

That puts the Hall Caine beyond normal recreational diving limits and means the dive must be planned accordingly.

Divers require appropriate Extended Range or technical diving certification for the depth, gases and decompression profile being undertaken, together with suitable recent deep-diving experience.

Dive planning needs to consider:

• Gas selection and reserves

• Increased gas consumption at depth

• Narcosis and oxygen exposure

• Decompression obligations

• Redundant gas supply

• Appropriate decompression gases where required

• Redundant critical equipment

• Cutting devices

• Lost-line and lost-wreck procedures

• Team separation procedures

• Surface and current conditions

• Emergency and contingency planning

Certification alone does not guarantee participation. Recent diving experience, demonstrated competency, equipment configuration, regulator, tank setup, side mount air twinset, gas requirements and conditions on the day may all be considered before divers are accepted for the dive.

Bottom Time Is Precious

The Hall Caine may be relatively compact, but depth changes everything. At these depths, every additional minute exploring the wreck affects gas requirements and decompression obligations. A disciplined dive allows you to descend directly onto the wreck, explore the major features and begin the ascent according to the team's predetermined schedule. This is precisely the type of wreck where good planning makes a good dive.

A Wreck Lost — Then Rediscovered

There's another great chapter in the Hall Caine story.

Although local fishers apparently knew something lay on the seabed, the wreck remained largely unknown to recreational divers until the 1970s. The story goes that information from a local fisher eventually led Les Graham to the site, where the wreck was dived in 1976.

By then, the timber structure had largely disappeared, leaving the boiler, engines, propellers, winches and other heavy machinery that divers explore today. So descending onto the Hall Caine isn't simply another deep dive.

You're visiting a wreck that disappeared beneath the Central Coast in 1937, remained largely the domain of fishermen for decades, and was eventually rediscovered by local divers.

Boat Dive - Central Coast

Hall Caine wreck dives are conducted by boat and are subject to suitable offshore weather, sea conditions and diver qualifications.

Minimum numbers apply — six suitably qualified and experienced divers are required for the trip to proceed.

Important Update: ex-HMAS Adelaide Dive Site Closure

For years, Central Coast Divers has proudly operated two double dives every day, welcoming divers from all over Australia as well as international visitors eager to experience one of the country’s most iconic artificial reefs—the ex-HMAS Adelaide.

Unfortunately, despite its proven history as a safe and professionally managed dive site, the department responsible for the wreck abruptly closed the site in July 2024 and will remain closed until further notice!

The justification provided, is that divers may cut themselves on jagged edges—an explanation that overlooks decades of safe diving operations, industry protocols, and the real conditions of underwater environments.

Whilst no diver wants to get hurt, this decision reflects a concerning lack of understanding about managing and evaluating underwater dive sites, and it has resulted in total inactivity for a wreck, that has been a cornerstone of the Central Coast dive economy since 2011.

At this time, no timeline has been provided for when—or if—the ex-HMAS Adelaide will reopen.

This closure impacts not only local operators and visiting divers, but also the broader tourism economy and the reputation of NSW as a world-class diving destination.

Central Coast Divers will continue to update our community as information becomes available. In the meantime, we are directing divers to alternative deep-wreck experiences and XR training opportunities along our coastline to keep advanced divers active, safe, and engaged.

Central Coast run two groups of divers each day weather permitting.
Boat returns to shore, between dives.

Group 1 - 08:00 am and 11:00 am
Group 2 - 09:30 am and 12:30 pm

The ex-HMAS Adelaide is one of the many dive sites we offer! You can join the dive crew as they head out on a morning boat dive to any one, of the many scheduled dive sites, on offer.

1. Boat dives depart from Terrigal Haven boat ramp, next to the Fish cleaning table  
2. Rental equipment is not included.
3. Please arrange 24 hours prior to departure
4. Book online 24/7
5. Bookings are essential.

NOTE: You must be Advanced and or Deep Certified to dive the ex-HMAS Adelaide.

NOTE: Before booking any dives with us, please read our Terms and Conditions including Cancellation Policy.

See below for any additional gear that you may require. 

Please note that you must be Nitrox certified in order to hire our Nitrox cylinders.